The domain within your query sequence starts at position 5806 and ends at position 5873; the E-value for the IGc2 domain shown below is 4.7e-9.

IGc2

The basic structure of immunoglobulin (Ig) molecules is a tetramer of two light chains and two heavy chains linked by disulphide bonds. There are two types of light chains: kappa and lambda, each composed of a constant domain (CL) and a variable domain (VL). There are five types of heavy chains: alpha, delta, epsilon, gamma and mu, all consisting of a variable domain (VH) and three (in alpha, delta and gamma) or four (in epsilon and mu) constant domains (CH1 to CH4). Ig molecules are highly modular proteins, in which the variable and constant domains have clear, conserved sequence patterns. The domains in Ig and Ig-like molecules are grouped into four types: V-set (variable; IPR013106), C1-set (constant-1; IPR003597), C2-set (constant-2; IPR008424) and I-set (intermediate; IPR013098) [(PUBMED:9417933)]. Structural studies have shown that these domains share a common core Greek-key beta-sandwich structure, with the types differing in the number of strands in the beta-sheets as well as in their sequence patterns [(PUBMED:15327963), (PUBMED:11377196)].

Immunoglobulin-like domains that are related in both sequence and structure can be found in several diverse protein families. Ig-like domains are involved in a variety of functions, including cell-cell recognition, cell-surface receptors, muscle structure and the immune system [(PUBMED:10698639)].

This entry represents a subtype of the immunoglobulin domain, and is found in a diverse range of protein families that includes glycoproteins, fibroblast growth factor receptors, vascular endothelial growth factor receptors, interleukin-6 receptor, and neural cell adhesion molecules. It also includes proteins that are classified as unassigned proteinase inhibitors belonging to MEROPS inhibitor families I2, I17 and I43 [(PUBMED:14705960)].

This information is based on mapping of SMART genomic protein database to KEGG orthologous groups. Percentage points are related to the number of proteins with IGc2 domain which could be assigned to a KEGG orthologous group, and not all proteins containing IGc2 domain. Please note that proteins can be included in multiple pathways, ie. the numbers above will not always add up to 100%.